Security advisory

{
  "id": "0b95b23adb58c47919fc3e43fa1fc5c376ff231e6a41924149ed6a0d3ac2289b",
  "url": "https://osv.dev/vulnerability/CVE-2025-26042",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "CVE-2025-26042",
    "summary": "Uptime Kuma >== 1.23.0 has a ReDoS vulnerability, specifically when an administrator creates a notification through the web service. If a string is provided it triggers catastrophic backtracking in the regular expression, leading to a ReDoS attack.",
    "evidence": "osv:CVE-2025-26042",
    "products": [],
    "severity": "medium",
    "structured": {
      "id": "CVE-2025-26042",
      "aliases": [
        "CVE-2025-26042",
        "GHSA-hx7h-9vf7-5xhg"
      ],
      "metrics": [
        {
          "type": "CVSS_V3",
          "score": "CVSS:3.1/AV:N/AC:H/PR:H/UI:R/S:U/C:L/I:H/A:H"
        }
      ],
      "affected": [
        {
          "ranges": [
            {
              "repo": "https://github.com/louislam/uptime-kuma",
              "type": "GIT",
              "events": [
                {
                  "introduced": "0"
                },
                {
                  "fixed": "7a9191761dbef6551c2a0aa6eed5f693ba48d688"
                }
              ],
              "database_specific": {
                "extracted_events": [
                  {
                    "range": [
                      {
                        "fixed": "7a9191761dbef6551c2a0aa6eed5f693ba48d688"
                      }
                    ],
                    "source": "REFERENCES_COMMIT"
                  }
                ]
              }
            }
          ],
          "versions": [
            "1.23.1",
            "1.23.0",
            "1.23.0-beta.1",
            "1.23.0-beta.0",
            "1.21.2",
            "1.21.2-beta.0",
            "1.21.1",
            "1.21.0",
            "1.21.0-beta.1",
            "1.21.0-beta.0",
            "1.20.0-beta.0",
            "1.19.4",
            "1.19.3",
            "1.19.2",
            "1.19.1",
            "1.19.0",
            "1.19.0-beta.2",
            "1.19.0-beta.1",
            "1.17.1",
            "1.17.0",
            "1.17.0-beta.1",
            "1.17.0-beta.0",
            "1.16.0-beta.0",
            "1.14.0-beta.2",
            "1.14.0-beta.1",
            "1.12.1",
            "1.12.0",
            "1.11.4",
            "1.11.3",
            "1.11.2",
            "1.11.1",
            "1.11.0",
            "1.10.2",
            "1.10.1",
            "1.10.0",
            "1.9.1",
            "1.9.0",
            "1.7.0",
            "1.6.0",
            "1.3.2",
            "1.3.1",
            "1.3.0",
            "1.2.0",
            "1.1.0",
            "1.0.10",
            "1.0.9",
            "1.0.8",
            "1.0.7",
            "1.0.5",
            "1.0.4",
            "1.0.3",
            "1.0.2",
            "1.0.1",
            "1.0.0"
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2025-26042.json"
          }
        }
      ],
      "modified": "2026-10-28T02:30:37.490573653Z",
      "provider": "osv",
      "references": [
        "https://github.com/CVEProject/cvelistV5/tree/main/cves/2025/26xxx/CVE-2025-26042.json",
        "https://nvd.nist.gov/vuln/detail/CVE-2025-26042",
        "https://github.com/louislam/uptime-kuma/issues/5574",
        "https://github.com/louislam/uptime-kuma/commit/7a9191761dbef6551c2a0aa6eed5f693ba48d688",
        "https://github.com/louislam/uptime-kuma/pull/5573"
      ],
      "provider_metadata": {
        "cna_assigner": "mitre",
        "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2025/26xxx/CVE-2025-26042.json"
      }
    },
    "related_cves": [
      {
        "value": "CVE-2025-26042",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 504665,
  "published_at": "2025-03-17T00:00:00+00:00"
}